Malicious PDF — malware analysis report

Static analysis result for SHA-256 6653d7c54f9f038b…

MALICIOUS

PDF

78.3 KB Created: 2021-05-17 11:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1425b0bf07286ed201830fbb2671e5d3 SHA-1: ddfd3e415dc4f44ea8ec8734f500e1a6ec2ecf84 SHA-256: 6653d7c54f9f038bc159451b3d5f435acd0345489bbc028de25376a81f8b6b8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/strik?utm_term=what+are+the+duties+of+a+transaction+coordinator PDF link annotation
    • http://qupieasy.online/tekidonomuw8fpg.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/DPdwgj4/radio_zu_top_40_mai_2020_download.pdfIn PDF document text
    • https://mabelemaje.weebly.com/uploads/1/3/4/7/134705401/f59652dc76b605.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/Ejhlgg3/blackboard_mdc_login.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/hd0FZ50/32231108472.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/kedotasut.pdfIn PDF document text
    • http://in-step.shop/ley_de_inquilinato_hondurasj8n91.pdfIn PDF document text
    • https://bovejivisesuja.weebly.com/uploads/1/3/1/3/131384116/fividoboxuni-rasenidaj-masibavex-posobuxofefuwow.pdfIn PDF document text
    • http://titanovyi-filtr.ru/saxamoliwaruvovpmcbf.pdfIn PDF document text
    • https://wefikugozakilo.weebly.com/uploads/1/3/1/0/131069992/tugebiwetadatesokesu.pdfIn PDF document text
    • http://glawerry.online/the_monkey_king_3_release_date_in_india_in_hindi_free_downloadnmsrj.pdfIn PDF document text
    • https://mikixobitesa.weebly.com/uploads/1/3/0/7/130776626/6772191.pdfIn PDF document text
    • http://tujomof.22web.org/horse_drawing_meme_steelers.pdfIn PDF document text
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/81cdbe64f8541.pdfIn PDF document text
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/kitute.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dusuvoparujizoj.rf.gd/metro_bilbao_mapa.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/zaxatewanuvufulijejiw.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/in_the_shadow_of_the_sword_book.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/captain_underpants_books_set_uk.pdfIn PDF document text
    • http://pabovabavuwemet.rf.gd/agenda_2020_para_el_desarrollo_sostenible_espaa.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/32088955874.pdfIn PDF document text
    • http://gotabuwane.epizy.com/sajorogiludib.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/front_mission_3_character_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 5088 bytes
SHA-256: 9717a4cdbd649cae9633c50832d049d1ca8762fbce09583ec3490c393107f02b
font_01_sfnt_off000105b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B6 11172 bytes
SHA-256: 317c9a07d723028edcaf8644dce106ceca53471c411f98036fe7b565d1ba65c2

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